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Patent Searching and Data


Title:
AMPLIFYING DEVICE, ACOUSTIC PROCESSING DEVICE AND METHOD FOR CONTROLLING CLASS-D AMPLIFIER CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/008627
Kind Code:
A1
Abstract:
This amplifying device is provided with: a self-excited class-D amplifier circuit including a modulation circuit in which pulse modulation by self-excited oscillation is performed on an acoustic signal; and an operation control unit that supplies, to the modulation circuit, a synchronous signal synchronized with the self-excited oscillation when an index related to the volume of the acoustic signal is lower than a threshold value, and stops supplying the synchronous signal to the modulation circuit when the index is higher than the threshold value.

Inventors:
TOGAWA, Takeshi (Nakazawa-cho Naka-ku, Hamamatsu-sh, Shizuoka 50, 〒4308650, JP)
Application Number:
JP2017/024341
Publication Date:
January 10, 2019
Filing Date:
July 03, 2017
Export Citation:
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Assignee:
YAMAHA CORPORATION (10-1, Nakazawa-cho Naka-ku, Hamamatsu-sh, Shizuoka 50, 〒4308650, JP)
International Classes:
H03F3/217; H03F3/38; H03F3/68
Attorney, Agent or Firm:
OHBAYASHI, Akira et al. (Ochanomizu Wing Building, 6th Floor 2-15-13 Hongo Bunkyo-k, Tokyo 33, 〒1130033, JP)
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